Casing spear



Patented Mar. 27, 1928.

UNITED STATES PATENT OFFICE.

WILLIAM H. HARVEY, OF WATER VALLEY, MISSISSIPPI.

CASING SPEAK.

Application filed April 6,

My present invention relates generally to devices for pulling casing or pipe from water, oil or gas Wells, and more particularly to that class ofpipe pulling andad-' justing devices commonly known as casing spears, my primary object being the provision of a casin spear which cannot become jammed while'in operation and which can be released and re-engaged in a well without drawing the toolto the surface.

A still further object is the provision of a tool having a pi e gripping element and means whereby suc element may be jarred both in upward and downward directions and which is generally more effective and efficient in use than those now employed.

In the accompanying drawing which illustrates my present invention and forms a part of this specification,

ig. 1 is a side elevation of my improved casing spear,

Fig. 2 is 'a .side view, partly in elevation and part1 in section thereof takenon line 22 of ig. 1;

Fig. 3 is an enlarged vertical longitudinal section through a portion thereof;

Fig. 4 is a horizontal section taken on line 4- 1: of Fig. 1; and a a Fig. 5 is a detailperspective view of the sliding sleeve.

Referring now to these figures, my invention proposes a casing spear consisting of a barrel 10 having upper and lower heads 11 and 12 which form hammers in use. The

heads 11 and 12 are preferably threaded on the barrel ends as shown and also pinned thereto by transverse pins 13 and the upper head is also preferably provided with an upstanding threaded extensionl providing for the coupling of the barrel to a drill stem or drill line or line. of pipe by means of which the spear is suspended and ma} nipulated.

The lower head 12 preferably has a depending threaded extension 15 for the connection and support of a guide bit 16 through a bit collar 17, the bit operating in use to-guide the spear into a pipe and to clear out any obstructions which it may be necessary to remove in permitting the spear, as a whole, to function. This bit may have openings 18 permitting the passage of water or fluid downwardly through the same from the barrel and supplied to the latter through the drill stem or line.

The upper and lower heads 11 and 12 are 1927. Serial No. 181,550.

also provided with circumferentially spaced arms 19 and 20 projecting toward one another and also spaced from the barrel 10, these arms constituting hammers or jars for a purpose which will presently appear.

Loosely disposed on the barrel 10 between the heads 11 and 12 is a sliding sleeve 21 having at spaced points therearound longitudinally movable casing-engaging slips 22 provided with surface teeth and side ribs 23 which are disposed in slanting guide slots 24 of the sleeve. are inclined in an upward direction and the slots 24.- are inclined so that the slips move radially of the sleeve in an outward direction when shifted downwardly.

The sleeve 21 also has upper and lower grooves 25 and 26 whioh'the hammer arms 19 and 20 are adapted to enter, these grooves being alined with the slips 22 so that the armsmay thus enga e the upper and lower ends of the slips. fietween the grooves 25 and 26, the sleeve has surface: springs 27 secured at their ends to the sleeve and so arranged as to frictionally engage the inner surface of a casing and thus hold the'sleeve in place so that the barrel can be shifted therethrough both longitudinally and rotatively.

Thus when the spear is lowered into a casing, the sleeve becomes frictionally engaged therewith and the barrel can then be turned so that its upper hammer arms 19 will enter the upper grooves 25 of the sleeve when the barrel is lowered, thus jarring or hammering the slips 22 downwardly and outwardly upon the sleeve into gripping re lation with the inner surface of the casing. Then before the barrel is raised, it is turned slightly so that the lower hammer arms will, in its upward movement, engage the lower end of the sleeve between the lower grooves and thus bear against the body of the gripped sleeve.

' When it is desired to release the sleeve so that the spear can be either removed from the well or shifted to grip the casing at another point, the barrel may be turned in the sleeve and shifted downwardly and its upper arms 19 will engage the upper end of the sleeve between the grooves 25, thus breaking the grip of the slips and the barrel again turned and shifted upwardly with its lower arms 20 alined with the lower grooves 26 of the sleeve so that these arms will thus engage the lower ends of the slips The teeth of these slips and below, my invention. broadly proposes;

an improved arrangement which will avoid all danger of 1amm1ng and W111 perm1tof better control of the operation aswell as greater ease in its accomplishment.

Furthermore, after engagement of, the slips with a pipe, as previously described, hammering ofth'e upper arms downwardly against the upper ends of the slips enables the, operator, to the pipe downwardly, While, hemm ringef t w r arms pwa ly against the-lewer surface of the sleeve enahlesj heqn 'ratot eiar e pip upward yf lai f '1, A casing spear including a, sleeve, slips movable thereon to grip, a casing, a barrel movable through the sleeve, and heads on the barrel aboveand below the sleeve having arms, projecting towardone another, saidbarrelbeing turnable to shift thesaid arms into and; out of; alinement with said 2 A casing spear, including a barrel having, upper and lower, heads, a sleeve loosely mounted on thebarrel between saiclheads, and; slips nnovableion the sleeve to grip a easing,; said heads having. means: shiftable with, the. barrel to engage both ends; of the sleeveandto engage both ends of the slips ndep ndent of; the gleam Aeasingspear including a barrel havngiupp a and ev a a ee loosely exemp ed; m he a l w en; aid, ds and slips movable on the sleeve to grip a aid; he ds hav ans: hif a W-ithflhebarrel to engage both ends of, the leeve, ndv oengageboth end at the lips n e en nti of; t e: ee n me n l Cl-Iflflfld by thesleeve, to frictionally, engage agcasingi r V v 4, A casing-spearincludinga sleeve, slips diastah e here a o gag a e and a: support; forthe sleeve having means to engage both, ends of the sleeve and the, said slips inde enden lyQt-Qne-amthen 5; A casing spear inelu'dii ig a sleeve, slips i abl h i o ng e asi nd aisupport for the sleeve.- having means to engage both ends of the sleeve'and thesaid Slips independently ofone, another, said meansaineluding a barrel movable tl'irough androtatablewithin said, sleeve. 7

6: A casing spear including a sleeve,

s aced] fro one ano her on said heads fbr.

movement agai st. the sleeeve. said barrel. bei g. shifiable though thesleeve nd rotatable with, respect thereto for shifting, the yi ntn and ut qfi alinementwith he s 1ps., v

t. n: a l, fi h g eal, abarr li; a no al y contracted expansihle. membe slid: ably arrangedflnllhe barrel, andfja hefldicarr ried' by each end of thebarrel',,01ie of. which be ng, gage h e with, he sxp'a s ble em: ber, tov expand, the latter. at will, and, the otherbeingalso engageablewith theex ani l emb r, 0: on t he, iley t a 9. In a device of thecharacterdescribed a barrel, a sleeve sl-idably inejinted thereon and having a plurality of 1011 'tudinal pate l n li gr e here n ofii t gaa gjsh i-l g u inally"adg s ahleiin the grooves w ereby to move the ornier readily. outwardly, or invmrdly, a, rotatable head upolp each enetll of, the. barrelfandaprivided Wlt np siti i vt n s we 1 e one of the heads beini adiptghtoibe iggsi-j ion l h ts finger l ilongi ndi a alimment with the slips whereby u onreciprp at n of thebarrelthe sliBs W1 lhe. fore d downwardly, in thegroovesto gripping pow sition, and the; other head being adapted; to be p i iened with ts fin e s i p se n lingi 'di l l nementwith e slips to orce the latter, tonormal, position, when,.,it is desired to release theob ect witl which theid'ee vice isengaged. V i V c Q; nsemi ation a well tub ngtaherea ceived fin a well casing, a barrel attaehed to the lower end of the-,vvell tubing; ,a; normally contractedv ex ansible, Inember, 'slidablyf ar; ranged on the barrel, and a head carriedby. each end of the barrel either of which ses-t e wit e xn asi e m r to expand oreontract the latter upon jarring the well tube in ,a predetermined direction, WILLIAM, HARVEY; V 

